LTC1099CSW Linear Technology, LTC1099CSW Datasheet

IC A/D CONV 8BIT HI-SPEED 20SOIC

LTC1099CSW

Manufacturer Part Number
LTC1099CSW
Description
IC A/D CONV 8BIT HI-SPEED 20SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1099CSW

Number Of Bits
8
Sampling Rate (per Second)
400k
Data Interface
Parallel
Number Of Converters
3
Power Dissipation (max)
55mW
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (0.300", 7.50mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LTC1099CS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1099CSW
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
KEY SPECIFICATIO S
TYPICAL
SAMPLE
Built-In Sample-and-Hold
No Missing Codes
No User Trims Required
All Timing Inputs Edge Sensitive for Easy Processor
Interface
Fast Conversion Time: 2.5 s
Latched Three-State Outputs
Single 5V Operation
No External Clock
Overflow Output Allows Cascading
T
0.3" Wide 20-Pin PDIP
Resolution: 8-Bits
Conversion Time: 2.5 s (RD Mode)
Slew Rate Limit (Internal S/H): 2.5V/ s
Low Power: 75mW Max
Total Unadjusted Error
HOLD
C
LTC1099: 1 LSB
LTC1099A: 0.75 LSB
V
Input Allows User Adjustable Conversion Time
IN
13
7
1
6
8
MODE
V
WR/RDY
RD
CS
REF
GND
Infinite Hold Time Sample-and-Hold (T
IN
LTC1099
APPLICATION
12
10
+
5V
REF
V
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
CC
2.5 s (WR/RD Mode)
20
11
17
16
15
14
5
4
3
2
10k
10k
1
2
3
4
5
6
7
8
U
B1
B2
B3
B4
B5
B6
B7
B8
REF +
REF
14
15
U
AM6012
15V
V
V
+
17
20
I
I
O
O
19
18
ACQ
= 240ns)
3
2
2.5k
+
LT1022
–15V
4
7
DESCRIPTIO
The LTC
8-bit analog-to-digital converter (A/D). An internal sample-
and-hold (S/H) allows the A/D to convert inputs up to the
full Nyquist limit. With a conversion rate of 2.5 s, this
allows 156kHz 5V
2.5V/ s, to be digitized without the need for an external
S/H.
Two modes of operation, Read (RD) mode and Write-Read
(WR-RD) mode, allow easy interface with processors. All
timing is internal and edge sensitive which eliminates the
need for external pulse shaping circuits. The Stand-Alone
(SA) mode is convenient for those applications not involv-
ing a processor.
Data outputs are latched with three-state control to allow
easy interface to a processor data bus or I/O port. An
overflow output (OFL) is provided to allow cascading for
higher resolution.
, LTC and LT are registered trademarks of Linear Technology Corporation.
6
1099 TA01
V
®
OUT
1099 is a high speed microprocessor compatible
Converter with Built-In
High Speed 8-Bit A/D
Signal-to-Noise Ratio (SNR) vs Input Frequency
P-P
Sample-and-Hold
U
– 36
– 38
– 40
– 42
– 44
– 46
– 48
– 50
– 52
input signals or slew rates as high as
1
INPUT FREQUENCY (kHz)
10
LTC1099
T
T
A
C
= 25 C
= 2.5 s
1099 G08
100
1

Related parts for LTC1099CSW

LTC1099CSW Summary of contents

Page 1

... Data outputs are latched with three-state control to allow easy interface to a processor data bus or I/O port. An overflow output (OFL) is provided to allow cascading for higher resolution. , LTC and LT are registered trademarks of Linear Technology Corporation. = 240ns) ACQ 15V 20 2.5k ...

Page 2

... REF A CC LTC1099AI/LTC1099I CONDITIONS MIN (Note – (Note 4) REF (Note 4) GND GND GND ORDER PART TOP VIEW NUMBER OFL LTC1099CSW 17 DB7 16 DB6 15 DB5 14 DB4 REF – 11 REF SW PACKAGE 20-LEAD PLASTIC SO = 150 C, = 130 C/W JA – and unless otherwise A MIN MAX LTC1099AC/LTC1099C TYP ...

Page 3

U DIGITAL AND DC ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are – 5V, REF = 5V, REF = 0V and SYMBOL PARAMETER ...

Page 4

LTC1099 W U TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Temperature – 50 – 100 AMBIENT TEMPERATURE 1099 G01 ...

Page 5

PIN FUNCTIONS V (Pin 1): Analog Input. IN DB0 to DB3 (Pins 2 to 5): Data Outputs. DB0 = LSB. WR/RDY (Pin 6): WR/RDY is an input when M0DE = V Falling edge of WR switches internal ...

Page 6

LTC1099 DIAGRA WR/RDY INT DB0-DB7 CS WR/RDY t CWR RD INT DB0-DB7 t ACC2 Figure 3a. WR-RD Mode (Pin 7 Is HIGH and t CS (GND) RD (GND) WR/RDY INT DB0-DB7 ...

Page 7

U U FUNCTIONAL DESCRIPTIO Figure 5 shows the functional block diagram for the LTC1099 2-step flash ADC. It consists of two 4-bit flash converters, a 4-bit DAC and a differencing circuit. The conversion process proceeds as follows the ...

Page 8

LTC1099 U U FUNCTIONAL DESCRIPTIO TAP DAC 0.5 LSB 0V LS TAP T SAMPLE –1 T –2 STROBE also that variations in the bias voltage with time and temperature will also be rejected. In ...

Page 9

U DIGITAL I TERFACE The digital interface to the LTC1099 entails either control- ling the conversion timing or reading data. There are two basic modes for controlling and reading the A/D — the Write-Read(WR-RD) mode and the Read (RD) mode. ...

Page 10

LTC1099 U U ANALOG INTERFACE The inclusion of a high quality sample-and-hold (S/H) simplifies the analog interface to the LTC1099. All of the error terms normally associated with an S/H (hold step, offset, gain and droop errors) are included in ...

Page 11

U U ANALOG INTERFACE APPLICATIONS Analog Multiplier The schematic Figure 9 shows the LTC1099 configured with a DAC to form a two quadrant analog multiplier. An input waveform is applied to the LTC1099 where it is digitized at a 300kHz ...

Page 12

LTC1099 U U ANALOG INTERFACE 0 –70 32.5 Figure 11. Two Quadrant Multiplier Output Spectrum with 0V to 4.5V at 42.5kHz into LTC1099 and 2V at 5kHz into DAC 0 –70 5 11500Hz Figure 12. Two Quadrant Multiplier Output Spectrum ...

Page 13

U TYPICAL APPLICATIONS (A10, B11, H2, L6) (B1, K11, L2 TMS320C25 MSC READY STRB (B8) (C10) (4) (6) (3) (5) 1/2 74AS00 TMS320C25 Assembly Code for RD Mode Interface to LTC1099 0001 0000 0002 0032 0003 ...

Page 14

LTC1099 U TYPICAL APPLICATIONS (A10, B11, H2, L6 TMS320C25 READY MSC R/ W STRB (B8) (C10) (H11) (H10) TMS320C25 Assembly Code for WR/RD Mode Interface to LTC1099 ...

Page 15

... DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... A Shutdown 5V, 60mW, 70dB SINAD 5V, 150mW, 48.5dB SINAD 5V, 80mW, 72.5dB SINAD 5V, 150mW, 81.5dB SINAD MODE REF 4 – REF 4 GND MODE REF 4 – REF 10 GND 1099 TA02 sn1099 1099fas LT/TP 1100 2K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1989 ...

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